Synopsis

It is rumored that a mysterious DVD exists and whoever dares to watch it gets cursed.

The first story centers around Akuno Mika who is in love with Kazuya, a schoolmate. But it seems she is too shy to confess to him. But what happens when she is cursed into a horny demon by the rumored DVD?

The second story is about Kana, who is watching the rumored DVD in request of her scared classmates. But she and her curious little sister Mai have to realize that the rumors are actually true!

An awesome work and visually nice, Koakuma kanojo is now one of my favourites hentais actually, no just its so sexy aun beauty Mika, but also the bit of romance its great and sweet
I found interesting characters even though being some simples, they relate well between them and show affection
Also the futanari part was so cool, that girls was really amazing
Something that I loved of this work was the romantic story, the poor girl that now it's a succubus and was in love for a long time of a young guy, so lovely and cute
Mika is so kind and nice girl, so sexy and beauty,
one of my favourite girls in anime
I will wish that was an entire anime, to see more of her
I recommend it

I found out by reading the previous reviews that only 1 other person has watched both OVAs for this one. so, disk 1(which I streamed both online) the synopsis is pretty much what MAL's listed. but they didn't list the synopsis of disk2. and the other reviewer(s) have gotten some stuff wrong. i'll get into that later. it's a great show, awesome stupendous cooler than hell. the devil girl first episode, yup! she's watched the dvd, and grows a tail, fangs, tiny bat wings from her back, and her boobs and body get very full and voluptuous. her tail tip squirts when she orgasms, and
it's very strong and prehensile and long! she changes when she feels 'thump thump thump' about the boy she likes. great premise! but she runs into him at school and pow. fireworks, lust, and she hides. guess who finds her annnd we know from watching H what happens next. the cursed sisters second episode, if you don't like futa, skip this one. cursed dvd check, older(NOT TWIN! as another reviewer mentioned) sister watches said dvd at home grows a boner, uses it on lil sis... lil sis wants revenge when big sis' "thing" goes away and watches the dvd too and 'switch'! like I said, if you don't like futa, skip the second episode on the 1st disk. a few repeating animations, looping, but otherwise... acting awesome. art stupendous. as always Pink Pineapple does great work! music, ok not terrible. squishy noises and other ASFX great!

now on to disk 2. this one entirely changes the whole premise put forth in disk1. it's a single episode 30+ minutes disk. magic highschool, human guy, human girl, and elf girl. think classic 1980-90 Japanese elf. long LONG narrow ears poking out of the sides of her head. long LONG blond hair, very very VERY curvy. there's a 'love potion' going around school. the human guy is oblivious to the human girl but she's sweet on him. he's only got eyes for the school idol, the elf girl. so the human girl gives him the 'love potion' as a dare and he tries it. whang bang boom, in a quiet place in the school elf girl and human boy cross species pollinate. ALOT! many many MANY TIMES. this dude's packing a few gallons for his super soaker. later on the human girl sees them making out, very heavy petting, and she's pissed. well, obliviously dude walks up all happy and the human girl clocks him one and he's KO. she drags him to the nurse's office, ties him to a bed and proceeds to take the 'love potion' and yep, enjoyable rapes him. she thinks she's ridden him to submission and unties him, switch! after that one's done the human girl runs into the elf girl at the door annddd our super soaker packing human has to run for his life before the 2 girls drain him dry. the quality of disk 2. 100% exactly the same as disk1. a few looped, repeating animations, but all the other items on disk2 just as good as disk1.

These are deciding factors which may sway the decision to watch for some. For me these are important things to know, as you can easily avoid a big waste of time if you don't like the content.

The story reminds you of the Ring, which is funny. Instead of a tape, there is a cursed DVD, and you don't die from watching it, instead you're cursed in some horribly perverted way.

It's a unique and not so unique plot that gives us
two separate stories in two episodes. The only thing each episode shares in common is that characters in each episode go to the same school and DVD has cursed the protagonist in each episode.

I highly recommend this if like hentai featuring cute succubi and especially if you like futanari. Not that much hentai with quality futanari. Koakuma Kanojo has some good futanari.

Pre-review TLDR:
Just recently seen the 2nd episode for this one and I've seen the 1st episode for it around a year ago and it's a bit blurry for me so i'm going to be mostly talking about the qualities of the 2nd episode here.

Though around 2 years worth of gap between the two episodes releases, the show packs quite a lot of scenes catering to a pretty wide array of fetishes and using some of the non-too common plot devices, mainly a dvd that curses whoever watches them to transform (for the 1st ep) and an aphrodisiac "love potion" circulating throughout the school
of magic they're attending.

The good:

• The characters. Again, keep in mind that i'm mostly talking about the 2nd episode here, but be it the fact that the art was done pretty well and that they're really cute, or that because one of them is an elf girl, but they're all pretty lovable in their own way. Especially on how they interacted with one another even if those scenes were pretty rare and short.

• The plot and premise. You don't get a lot of hentais starting with a cursed dvd video turning girls into succubi or twin sisters into futanaris. Though ones with love potions/aphrodisiacs aren't too rare, I still feel like it was handled pretty well here. The plot's not exactly deep, but it's certainly more than enough to keep you from getting bored or too impatient to just skip to the scenes

• The soundtrack. A couple of the tracks stood out for me which is always cool, and also the ending theme left me jamming along with the recap video.

• The art and animation. Like I said earlier, the girls are really cute and the artwork was done pretty well. Animations are pretty good too but could've used juuuust a bit more improvement, but overall it's pretty good.

The bad:

• Not much to say. It's a pretty solid release, even with the huge gap between the episodes, they're still both pretty good and worth watching.

Final Verdict:
As much as I don't completely remember the first ep, it was pretty great from what I remember and the second ep is not too different in that regard. A show that's definitely worth watching if you're into the stuff listed since it caters to a pretty wide array of fetishes and handles them pretty well, paired with good art, cute girls and nice animation. And yeah, Elena best girl.